AN3985 datasheet(65/105 Pages) STMICROELECTRONICS

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AN3985

LRIxK layer

Doc ID 022255 Rev 2

65/105

LRIxK_Initiate function

This function sends, through the CR95HF, an initiate command to an LRIxK contactless tag

present in the RF field or designated by its UID. On receiving the initiate command, the

LRIxK contactless tag sets the internal initiate flag (to send an inventory initiated command)

and returns its UID and its DSFID.

Note:

The command should not be in addressed or selected mode.

ISO15693_Fast_Read_Single_Block function

This function sends, through the CR95HF, a read single block command to the LRIxK

contactless tag in the field. The particularity of this command is the data rate used by the

contactless tag to answer: 53kbits/s.

Table 112.

LRIxK_Initiate function description

Prototype

u8 LRIXK_Initiate(ISO15693_Tag* MyTag, const u8

Request_flags);

Input parameter

Request_flags: option flag to indicate the parameters to use for the flag

response (1)

Masklength represents the numbers of significant bits. The user should ensure that others bits are reset for

padding.

Output parameter

MyTag: pointer on the structure that contains the tag response

Return parameter

LRIxK_ERROR_CODE: The command failed. Either there is no tag or the tag

did not manage to perform the request.

LRIxK_ERROR_REQUEST_FLAGS_CODE: The inventory flag is not set.

LRIxK_COMMAND_SUCCESS_CODE: The tag answered the command.

Table 113.

ISO15693_Fast_Read_Single_Block function description

Prototype

u8 LRIxK_Fast_Read_Single_Block(ISO15693_Tag* MyTag,

const u8 Request_flags, const u8* Tag_UID, const u8

Block_number);

Input parameter

Request_flags: option flag to indicate the parameters to use for the flag

response and if UID is present (addressed)

Tag_UID: pointer on the UID of the tag

Block_number: address of the block to read

Output parameter

MyTag: pointer on the structure that contains the tag response

Return parameter

None

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